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tdconline.com screenshot

Report Summary

  • 5

    Performance

    Renders faster than
    21% of other websites

  • 94

    Accessibility

    Visual factors better than
    that of 84% of websites

  • 92

    Best Practices

    More advanced features
    available than in
    81% of websites

  • 100

    SEO

    Google-friendlier than
    95% of websites

tdconline.com

Tiedemann's Diving Center

Page Load Speed

2 sec in total

First Response

152 ms

Resources Loaded

1.7 sec

Page Rendered

168 ms

tdconline.com screenshot

About Website

Welcome to tdconline.com homepage info - get ready to check Tdconline best content right away, or after learning these important things about tdconline.com

Tiedemann's Diving Center - Long Island, New York's Premier Scuba Diving Education Facility. Teaching Long Island to Scuba Dive Since 1970

Visit tdconline.com

Key Findings

We analyzed Tdconline.com page load time and found that the first response time was 152 ms and then it took 1.9 sec to load all DOM resources and completely render a web page. This is quite a good result, as only 35% of websites can load faster.

Performance Metrics

tdconline.com performance score

5

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value6.6 s

2/100

10%

LCP (Largest Contentful Paint)

Value8.2 s

2/100

25%

SI (Speed Index)

Value8.4 s

18/100

10%

TBT (Total Blocking Time)

Value2,050 ms

7/100

30%

CLS (Cumulative Layout Shift)

Value1.048

2/100

15%

TTI (Time to Interactive)

Value18.4 s

3/100

10%

Network Requests Diagram

tdconline.com

152 ms

menu.htm

82 ms

main.shtml

109 ms

snowstorm.js

106 ms

view_rss.js

447 ms

Our browser made a total of 33 requests to load all elements on the main page. We found that 88% of them (29 requests) were addressed to the original Tdconline.com, 6% (2 requests) were made to Feedrollpro.com and 3% (1 request) were made to Banners.wunderground.com. The less responsive or slowest element that took the longest time to load (1.4 sec) relates to the external source Banners.wunderground.com.

Page Optimization Overview & Recommendations

Page size can be reduced by 17.2 kB (38%)

Content Size

44.8 kB

After Optimization

27.6 kB

  • HTML
  • Images
  • JavaScript

In fact, the total size of Tdconline.com main page is 44.8 kB. This result falls beyond the top 1M of websites and identifies a large and not optimized web page that may take ages to load. Only 10% of websites need less resources to load. Images take 25.8 kB which makes up the majority of the site volume.

HTML Optimization

-41%

Potential reduce by 354 B

  • Original 862 B
  • After minification 848 B
  • After compression 508 B

HTML content can be minified and compressed by a website’s server. The most efficient way is to compress content using GZIP which reduces data amount travelling through the network between server and browser. HTML code on this page is well minified. It is highly recommended that content of this web page should be compressed using GZIP, as it can save up to 354 B or 41% of the original size.

Image Optimization

-8%

Potential reduce by 2.1 kB

  • Original 25.8 kB
  • After minification 23.7 kB

Image size optimization can help to speed up a website loading time. The chart above shows the difference between the size before and after optimization. Tdconline images are well optimized though.

JavaScript Optimization

-81%

Potential reduce by 14.7 kB

  • Original 18.1 kB
  • After minification 10.6 kB
  • After compression 3.4 kB

It’s better to minify JavaScript in order to improve website performance. The diagram shows the current total size of all JavaScript files against the prospective JavaScript size after its minification and compression. It is highly recommended that all JavaScript files should be compressed and minified as it can save up to 14.7 kB or 81% of the original size.

Requests Breakdown

Number of requests can be reduced by 8 (25%)

Requests Now

32

After Optimization

24

  • AJAX
  • Images
  • JavaScript

The browser has sent 32 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Tdconline. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests and as a result speed up the page load time.

Network Requests Diagram

tdconline.com

tdconline.com

152 ms

menu.htm

menu.htm

82 ms

main.shtml

main.shtml

109 ms

snowstorm.js

snowstorm.js

106 ms

view_rss.js

view_rss.js

447 ms

tdcback.gif

tdcback.gif

73 ms

tdclogo.gif

tdclogo.gif

73 ms

tdcslogan.gif

tdcslogan.gif

74 ms

Levittown.gif

Levittown.gif

1362 ms

joindantoday.jpg

joindantoday.jpg

147 ms

emailanim.gif

emailanim.gif

36 ms

currenttop.gif

currenttop.gif

73 ms

currenttitle.gif

currenttitle.gif

74 ms

currentwintop.gif

currentwintop.gif

77 ms

currentwinmid.gif

currentwinmid.gif

78 ms

currentbot.gif

currentbot.gif

78 ms

classes.gif

classes.gif

113 ms

poolclasssm.jpg

poolclasssm.jpg

139 ms

advanced.jpg

advanced.jpg

141 ms

lidalogosm.jpg

lidalogosm.jpg

153 ms

overhaul.jpg

overhaul.jpg

160 ms

photogallerypink.gif

photogallerypink.gif

145 ms

shutterfly.jpg

shutterfly.jpg

183 ms

Container_6.jpg

Container_6.jpg

208 ms

localdives.gif

localdives.gif

214 ms

bridgethumb.jpg

bridgethumb.jpg

214 ms

events.gif

events.gif

219 ms

bostonsearoversthumb.gif

bostonsearoversthumb.gif

234 ms

bts2003thumb.gif

bts2003thumb.gif

250 ms

trips.gif

trips.gif

282 ms

castle.gif

castle.gif

283 ms

dunbarrock.jpg

dunbarrock.jpg

285 ms

view_rss.php

view_rss.php

82 ms

Accessibility Review

tdconline.com accessibility score

94

Accessibility Issues

Contrast

These are opportunities to improve the legibility of your content.

Impact

Issue

High

Background and foreground colors do not have a sufficient contrast ratio.

Navigation

These are opportunities to improve keyboard navigation in your application.

Impact

Issue

High

Heading elements are not in a sequentially-descending order

Names and labels

These are opportunities to improve the semantics of the controls in your application. This may enhance the experience for users of assistive technology, like a screen reader.

Impact

Issue

High

Links do not have a discernible name

Best Practices

tdconline.com best practices score

92

Areas of Improvement

Trust and Safety

Impact

Issue

High

Does not use HTTPS

Low

Ensure CSP is effective against XSS attacks

General

Impact

Issue

Low

Detected JavaScript libraries

High

Page has valid source maps

SEO Factors

tdconline.com SEO score

100

Search Engine Optimization Advices

Mobile Friendly

Make sure your pages are mobile friendly so users don’t have to pinch or zoom in order to read the content pages. [Learn more](https://developers.google.com/search/mobile-sites/).

Impact

Issue

High

Document uses legible font sizes

Language and Encoding

  • Language Detected

    EN

  • Language Claimed

    N/A

  • Encoding

    WINDOWS-1252

Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise Tdconline.com can be misinterpreted by Google and other search engines. Our service has detected that English is used on the page, and neither this language nor any other was claimed in <html> or <meta> tags. Our system also found out that Tdconline.com main page’s claimed encoding is windows-1252. Changing it to UTF-8 can be a good choice, as this format is commonly used for encoding all over the web and thus their visitors won’t have any troubles with symbol transcription or reading.

Social Sharing Optimization

tdconline.com

Open Graph description is not detected on the main page of Tdconline. Lack of Open Graph description can be counter-productive for their social media presence, as such a description allows converting a website homepage (or other pages) into good-looking, rich and well-structured posts, when it is being shared on Facebook and other social media. For example, adding the following code snippet into HTML <head> tag will help to represent this web page correctly in social networks: